Final answer:
In 'Of Mice and Men', foreshadowing is used to hint at future events, particularly through the pattern of Lennie accidentally killing small creatures, which foreshadows the novel's climax.
Step-by-step explanation:
Foreshadowing is a literary device by which an author hints at certain plot developments that might come to pass in a story. In the novel 'Of Mice and Men', an example of foreshadowing is the recurring references to the death of small creatures at the hands of Lennie.
This pattern suggests the possibility of a similar fate for other characters, due to Lennie's lack of control over his own strength. Focused attention on Lennie's actions with the mice and the puppy forewarn the reader of his accidental yet tragic action later in the novel with Curley's wife.